When you start the vehicle the brake pedal falls to the floor and you can not stop it. Also at a stop the brake pedal slowly falls to the floor. According to the dealer they don’t know what causes this and it still does it. They said no ABS lights came on so this is normal. I don’t think it’s normal if I put it in reverse and can not get it to stop because the pedal recedes out of my reach. The truck kept going in reverse the brakes wouldn’t stop it.